Practice Questions (with answers) Quiz #6 material Consider the plot below to answer questions 1 and 2. 1. Which of the following orbitals could the probability density shown above represent? a. 3 p b. 2 s c. 3 s d. both b. and c. e. both a. and c. 2. At what distance from the nucleus do the nodes occur in this orbital? a. approximately 2.5 pm and 6.5 pm b. approximately 132 pm and 344 pm c. approximately 212 pm and 582 pm d. approximately 4.5 pm and 11 pm e. approximately zero pm from the nucleus

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Consider the following plots to answer questions 3-5. 3. Which of the following must be true about the curves A, B, and C plotted above? a. Curves A, B, and C represent orbitals that have different energies b. Curves A, B, and C represent orbitals that are degenerate c. All of the curves must represent orbitals with l > 0 d. both a. and c. e. all of a., b., and c. 4. Which of the following orbitals could curve A above represent? a. 2p b. 2s c. 1s d. both a. and b. e. both b. and c. A B C

5. Which of the following must be true about the curves A, B, and C plotted above? a. The orbitals represented by A, B, and C have only one phase. b. Curve C could represent an orbital with n = 3. c. The orbitals represented by A, B, and C have l > 0. d. both b. and c. e. all of a., b., and c. 6. The nucleus of a hydrogen atom is located at the origin on a set of x , y , and z axes. Suppose the probability of finding the 2 s electron at the point ( x , y , z ) = (d, 0, 0) is 0.01. Which of the following must be true? a. The probability of finding the electron at ( x , y , z ) = (0, 0, d) is 0.01. b. The probability of finding the electron at ( x , y , z ) = (0, 0, d) is zero. c. The probability of finding the electron at ( x , y , z ) = (2d, 0, 0) is equal to 0.02. d. both a. and c. e. both b. and c. 7. The nucleus of a hydrogen atom is located at the origin on a set of x , y , and z axes. Suppose the probability of finding the 2 p z electron at the point ( x , y , z ) = (0, 0, 0.05) is equal to 0.001. Which of the following must be true? a. The probability of the finding the electron at ( x , y , z ) = (0, 0.05, 0) is equal to 0.001. b. The probability of finding the electron at ( x , y , z ) = (0.05, 0, 0) is equal to 0.001. c. The probability of finding the electron at the point ( x , y , z ) = (0.05, 0.05, 0) is less than 0.001. d. both a. and b. e. all of a., b., and c.

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